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NASA: Moon wobble to cause coastal flooding surge by 2030s
WASHINGTON — By the mid-2030s every U.S. coast will experience "rapidly increasing high-tide floods," as a "wobble" in the moon's orbit combines with the effects of climate change, NASA warns in a newly released study.
Members of the NASA Sea Level Change Science Team from the University of Hawaii predict that high tides will top flooding thresholds around the country more often. NASA said the study, published in the journal Nature Climate Change, is the first to take into account all known oceanic and astronomical causes for flooding.
"The combination of the Moon’s gravitational pull, rising sea levels, and climate change will continue to exacerbate coastal flooding on our coastlines and across the world," NASA Administrator Bill Nelson said in a statement. "NASA’s Sea Level Change Team is providing crucial information so that we can plan, protect, and prevent damage to the environment and people’s livelihoods affected by flooding.”
The government agency explained that the moon's "wobble" affects its gravitational pull - which is the main cause of Earth's tides. The wobble, which was first reported in 1782, takes about 18.6 years to complete. During half of which, Earth’s regular daily tides are suppressed. However, for the other half, the tides are "amplified."
The Earth is already dealing with high tide floods due to climate change, so this phenomenon will only make it worse. The National Oceanic and Atmospheric Administration (NOAA) reported a total of more than 600 high tide floods in 2019 in many cities on the U.S. Atlantic and Gulf coasts.
“It’s the accumulated effect over time that will have an impact,” said Phil Thompson, an assistant professor at the University of Hawaii and the lead author of the study. “But if it floods 10 or 15 times a month, a business can’t keep operating with its parking lot under water. People lose their jobs because they can’t get to work.
NASA added that flooding is expected to rise near almost all U.S. mainland coastlines, Hawaii, and Guam. However, northern coastlines like Alaska, might not see any changes for nearly a decade.
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originally posted by: Darkstar2
a reply to: putnam6
I have been looking into what lies behind the NASA release. It isn't about the wobbles you mention, but a rather different one.
The orbit of the moon is tilted by about 5° from the ecliptic and the orientation of this tilt rotates around the earth.
This rotation takes about 18.5 years.
Adding in the earth tilt of 23° from the ecliptic then the total will vary, with there being something of the order of 10° difference of altitude of the moon depending on the orientation of the moon's orbit tilt.
The articles I've seen suggest that there would be several inches increase in high tides in the 2030s, and that is ignoring global warning melting the ice.
It is not easy to visualize this, and I haven't seen an explanation that is completely clear.
originally posted by: everyone
a reply to: MiaBandetohDoes a Op have to agree or disagree with a topic ?
It’s thought to be the largest comet yet discovered, possibly as big as a dwarf planet. It’s still far away and hard to see, but the current estimate suggests its nucleus, or core, is between 62 to 230 miles (100 to 370 km) in diameter. Whoa! That’s big for a comet.
The mega comet is not coming very close to us. It’ll make its closest approach in 2031, when it’ll sail just outside of the orbit of our sun’s 6th planet, Saturn. Saturn’s orbit is some nine and a half times farther from the sun than Earth’s orbit. So there’s no danger to us here.
Pedro Bernardinelli announced the discovery on Twitter on June 19, 2021.
originally posted by: Darkstar2
a reply to: TritonTaranis
The 'mega comet' is too far away to have any effect on the inner solar system. Currently it is outside the orbit of Neptune, and will not get any closer than Saturn.
originally posted by: Darkstar2
a reply to: putnam6
I have been looking into what lies behind the NASA release. It isn't about the wobbles you mention, but a rather different one.
The orbit of the moon is tilted by about 5° from the ecliptic and the orientation of this tilt rotates around the earth.
This rotation takes about 18.5 years.
Adding in the earth tilt of 23° from the ecliptic then the total will vary, with there being something of the order of 10° difference of altitude of the moon depending on the orientation of the moon's orbit tilt.
The articles I've seen suggest that there would be several inches increase in high tides in the 2030s, and that is ignoring global warning melting the ice.
It is not easy to visualize this, and I haven't seen an explanation that is completely clear.
originally posted by: Zanti Misfit
a reply to: karl 12
NASA Control - Mission Accomplished !